class_docstr: AC自动机的树结点.
  
  Attributes:
      next: dict类型，指向子结点
      fail: Node类型，AC自动机的fail指针
      length: int类型，判断节点是否为单词
docstr: 初始化空节点.
docstr_tok: ["\u521d\u59cb\u5316\u7a7a\u8282\u70b9","."]
code: def __init__(self):
      """初始化空节点."""
      self.next = {}
      self.fail = None  # fail指针默认为None
      self.length = -1
  
file_path: PaddleHub/modules/text/lexical_analysis/lac/ahocorasick.py
label_desc: Use image node_id 1 to create a new Node object from inherited base classes: object with example: obj = Node()